Heat wrap on a tubular mani, good or bad?

[float_6969]

I'm thinking about heat wrapping my tubular manifold to try and keep the under-hood temps down, but I don't know if the extra internal heat is going to stress the welds or not. What do you guys think? Yes=Wrap itNo=Don't wrap it

[Dattebayo]

Yeah, that was the death of my first header on my KA motor. It wont be a fast death for the part, but it will make the welds go sooner for sure.

[float_6969]

2BN_S13:I edited my post, did you mean yes wrap it, or yes, don't wrap it?

[c-rad]

No! Heat-wrapping stainless = not a good idea. Get it ceramic coated if anything.

[Turbogixxer]

Whats the gauge of the tubing of the manfold?

[originalsin]

kind of ot but to C-rad - any kind of ss? like my megan sr downpipe hits the underside of the chassis and im planning on wrapping it so it wont...

[c-rad]

SHOULD be okay on a downpipe. It restricts the metal from expanding on the manifold and can make it brittle.

[slownslurious]

I'm sure it voids header warranties for a reason...

[Not_a_sr]

http://www.afipowder.com/ this is were we send all of our stuff, they have really good pricing and fast turn around times. and they will replace the coating free if it comes off within a certain time frame. out of 50+ kits we have had only one kit flake off, it was within 30mins of getting it hot, they offered to recoat imediately.

[slownslurious]

but that would only make it look prettier.. I mean the name says it all, aesthic coatings...I'd think if you were going to the time and expense you want that special coating, whats it called, swain or whatever?

[Dattebayo]

Get it ceramic coated if anything.

I agree, get ceramic coated. Do not heat wrap at all, period. You should never resort to that. You can get a "clip on" heat shield custom welded that would work better for your purposes; particularly something that redirects the heat downward when your car is in motion. Its not exactly an engineering challenge to make that kind of shield, and will save you more in the end.

[Not_a_sr]

did yah even check the link? thats what that is ceramic coating just like swain or jethot. they coat the outsides and insides of the piping its good stuff.

but that would only make it look prettier.. I mean the name says it all, aesthic coatings...I'd think if you were going to the time and expense you want that special coating, whats it called, swain or whatever?

[float_6969]

Well I guess it's unanimous. The mani is on the car right now, but when I pull the down pipe to have the bung welded on for the wideband, I guess I'll go ahead pull the mani back off too. Thanks guys!

[CA19DET]

dont do it, mine cracked all over, and then i only wrapped the wastegate pipe and guess what, that cracked too,

the wrap collects moisture. the welds got o crap.

[81na ZX]

A physical heat shield is a better use of your money.

[biosehnsucht]

My KA had a hotshot on it that the previous owner (of the hotshot, not the car) had gotten ceramic coated.

After installing it the underhood temps were down slightly relative to the stock manifold (which didn't have all the heat shielding on it anymore).

Ceramic coatings are TEH WIN

[originalsin]

the reason im using it on my downpipe is because it hits the under side of the car some, it wont be over any welds, just the pipe, and i wont make it super tight either

[redamnavit]

Swaincoat:

http://home.comcast.net/~redamnavit/mani.jpg

I'll get a temp reading when I get my motor running.

[biosehnsucht]

interesting, didn't know the stock mani was set up for divided inlet (never took my turbos off the mani's)

niec packing peanut, almost looks like it got coated too

[float_6969]

The stock mani is actually a good setup. It isn't a 4-1 like the ssautocrap mani's are.

[redamnavit]

interesting, didn't know the stock mani was set up for divided inlet (never took my turbos off the mani's)

niec packing peanut, almost looks like it got coated too

Hehe, I was wondering if anyone would comment on that. I dissasembled the turbo and had the exhaust housing coated the same way. I have a pic of the whole thing assembled somewhere.

[float_6969]

It would be even cooler if you'd get that damn thing running someday! Oh wait, I haven't had mine for over a year.....Heheheh

[Vetal]

Is

The stock mani is actually a good setup. It isn't a 4-1 like the ssautocrap mani's are.

Is stock manifold better than tubular 4-1's ?

[slownslurious]

depends on "better"I've heard that the quality tubular ones increase HP, but it depends on the size and design of their runners. The stock one is darn well crack proof, so it always has that going for it.

[themadscientist]

I cracked a stainless header when I wrapped it and they don't even get as hot as a turbo manifold

[Dattebayo]

Can you extrude hone the inside of the stock mani? I dont know if you can do that to cast iron, but it sounds like a cool idea for reliability.

[themadscientist]

you can. you should. I will.

[float_6969]

Is Is stock manifold better than tubular 4-1's ?

In the fact that it is basically crack proof and it uses a divder so that you don't have the exhaust pulses from other runners sucking back into another port, yes, it is a good manifold. But it isn't equal length and has limited flow.

[Dattebayo]

Now I know what to do with that extra manifold that I have.

Thanks for the .02